US4695381A - Filter for continuous filtering of a suspension under pressure - Google Patents

Filter for continuous filtering of a suspension under pressure Download PDF

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Publication number
US4695381A
US4695381A US06/858,769 US85876986A US4695381A US 4695381 A US4695381 A US 4695381A US 85876986 A US85876986 A US 85876986A US 4695381 A US4695381 A US 4695381A
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US
United States
Prior art keywords
filter
filtering
zone
filtrate
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US06/858,769
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English (en)
Inventor
Samuel Ragnegard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
INDUSUM I GOTEBORG AB
HEDEMORA VERKSTADER AB
Original Assignee
HEDEMORA VERKSTADER AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HEDEMORA VERKSTADER AB filed Critical HEDEMORA VERKSTADER AB
Assigned to AB HEDEMORA reassignment AB HEDEMORA ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: RAGNEGARD, SAMUEL
Application granted granted Critical
Publication of US4695381A publication Critical patent/US4695381A/en
Assigned to CELLECO-HEDEMORA AB reassignment CELLECO-HEDEMORA AB ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: AB FIMBUL
Assigned to INDUSUM I GOTEBORG AB reassignment INDUSUM I GOTEBORG AB ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CELLECO-HEDEMORA AB, KARLSSON, HANS, LARSSON, PER, STRID, KENT
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/30—Filter housing constructions
    • B01D35/31—Filter housing constructions including arrangements for environmental protection, e.g. pressure resisting features
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/15—Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces
    • B01D33/21—Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces with hollow filtering discs transversely mounted on a hollow rotary shaft
    • B01D33/23—Construction of discs or component sectors thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/44—Regenerating the filter material in the filter
    • B01D33/46—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element
    • B01D33/463—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/58—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element
    • B01D33/62—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element for drying
    • B01D33/66—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element for drying by gases or by heating
    • B01D33/663—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element for drying by gases or by heating by direct contact with a fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/80—Accessories
    • B01D33/801—Driving means, shaft packing systems or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/80—Accessories
    • B01D33/804—Accessories integrally combined with devices for controlling the filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/80—Accessories
    • B01D33/804—Accessories integrally combined with devices for controlling the filtration
    • B01D33/807—Accessories integrally combined with devices for controlling the filtration by level measuring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/80—Accessories
    • B01D33/804—Accessories integrally combined with devices for controlling the filtration
    • B01D33/808—Accessories integrally combined with devices for controlling the filtration by pressure measuring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/20—Pressure-related systems for filters
    • B01D2201/204—Systems for applying vacuum to filters

Definitions

  • the present invention relates to a filter for continuous filtering of a suspension under pressure.
  • Filters for continuous filtering of a suspension are common within e.g. cellulose industry where suspensions have large volume flow and have comparatively high concentration of solid phase.
  • the type of filter, up to now, most commonly existing for this purpose is rotating drum or disc filters which operate with vacuum for establishing required difference pressure over the filter.
  • the difference pressure in the liquid phase is preferably lower than that in the gaseous phase.
  • FIG. 3 is a view schematically illustrating the operation of the filter
  • FIG. 4 is a view corresponding to FIG. 3 and illustrating another embodiment of the invention.
  • the filter shown in FIG. 1 includes a substantially cylindrical pressure vessel 1, in which a shaft 2 provided with a number of filter discs 3 is rotatably journalled.
  • Each filter disc consists of a plurality of disc sectors 4 (see FIG. 2) and the disc sectors can e.g. have the configuration that is shown in U.S. patent application No. 577,913 filed Feb. 7, 1984.
  • the filter sectors consist of a surrounding filter cloth and interior channels (not shown) which for each filter sector are connected to an axial channel formed in the shaft 2, i.e. a channel for each filter sector, for discharging the filtrate obtained during the filtering operation to filtrate valve 5 arranged at one end of the shaft 2.
  • filtering and drying of the filter cake takes place in gaseous phase with air, vapour or another appropriate gas present.
  • washing of the filter cloth can also take place in the zone 7 by means of some appropriate wash device 12, e.g. a spray.
  • the filtrate valve 5 is provided with a number of filtrate outlets 13, 14 and 15 corresponding to the number of filtering zones.
  • the removed filter cake falls down into a funnel 16 provided with an out-feed screw 17.
  • FIG. 3 shematically illustrates how the filter opeates.
  • the suspension to be filtered is supplied to the filter 1 via inlet 18 and forms in the filter a level 19.
  • a difference pressure required for a filtering operation in a filter according to the invention is created by means of an appropriate device 20, e.g. a blower.
  • the filter cake removed by means of the device 11 falls down to the outfeed screw 17 and is fed therefrom to an outfeed sluice 20'.
  • the filtrate from the filtering zones 7 is discharged from the pressure vessel 1 via the filtrate outlet 13 to a sluice 21 and further to a filtrate tank 22.
  • the filtrate from the filtering zone 8 is discharged from the pressure vessel 1 via the filtrate outlet 14 to the filtrate tank 22.
  • the filtrate from the filtering zone 9 is discharged from the pressure vessel via the filtrate outlet 15 to the filtrate tank 22 and enters into the tank above the level therein in order to obtain a separation between the filtrate liquid and co-conveyed gas.
  • the gas which is squeezed through the filter cake 10 in the filtering zone 9 by means of the positive pressure generated by the blower 20 and follows the filtrate into the filtrate outlet 15, is re-circulated from the filtrate tank 22 back to the filter via the blower 20.
  • the lower intermediate walls 6 are inclined downwardly and their outer ends are positioned at a level, below the suspension level 19 for preventing gas from being present in the filter sectors during the filtering in the liquid phase 8.
  • the filter For obtaining the difference pressure over the filter required for the filtering operation, some form of restriction in the gas circulation via the blower 20 is required.
  • the filter operates with a filter cake 10 on the filter elements 4, the filter cake becomes the required restriction.
  • the required restriction can, according to the invention, be established in the filtrate outlet 15 by means of some appropriate means. As shown in FIG. 3, this means consists of a valve 23, which throttles the filtrate outlet 15 when no other restriction exists and opens when a filter cake is formed on the filter.
  • the valve 23 is particularly useful when the suspension level in the vessel for some reason sinks below the shaft 6.
  • a further alternative is to provide the filtrate outlet 15 with a seprate liquid lock instead of the valve 23.
  • the solutions mentioned above having the valve 23 are, however, preferred in most cases, since then no aditional restriction or resistance loads the blower 20 during normal filtrating and thereby the entire capacity of the blower can be utilized for the filtering operation.
  • a control valve 25 arranged in the filtrate outlet 14.
  • One way of governing this valve is by means of a level sensor 26 on the filter 1.
  • This level sensor arranged to govern the control valve 25 and the rotation speed of the filter so that the suspension level 19 is kept constant at a preset value, firstly by governing the control valve until it is completely open, whereupon the level sensor begins to govern the velocity of the filter from a preset minimum value and upwards so that the suspension level is kept constant.
  • the invention has been described above and shown on the drawings in connection with a disc filter.
  • the invention can also relate to a drum filter, i.e. a filter element in the form of a rotating drum with surrounding filter cloth.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Filtration Of Liquid (AREA)
  • Paper (AREA)
US06/858,769 1985-05-02 1986-05-02 Filter for continuous filtering of a suspension under pressure Expired - Lifetime US4695381A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8502122 1985-05-02
SE8502122A SE451948B (sv) 1985-05-02 1985-05-02 Filter for kontinuerlig filtrering under tryck av en suspension

Publications (1)

Publication Number Publication Date
US4695381A true US4695381A (en) 1987-09-22

Family

ID=20360041

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/858,769 Expired - Lifetime US4695381A (en) 1985-05-02 1986-05-02 Filter for continuous filtering of a suspension under pressure

Country Status (6)

Country Link
US (1) US4695381A (sv)
JP (1) JPH0675656B2 (sv)
CA (1) CA1268427A (sv)
DE (1) DE3614668A1 (sv)
FI (1) FI83596C (sv)
SE (1) SE451948B (sv)

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0315388A2 (en) * 1987-11-05 1989-05-10 A. Ahlstrom Corporation Method and apparatus for treating fiber suspension
US4929355A (en) * 1985-02-05 1990-05-29 Ab Hedemora Verkstader Method and apparatus for the separation of caustic liquor, lime sludge and sludge in a causticizing process
US5192454A (en) * 1987-11-05 1993-03-09 A. Ahlstrom Corporation Method for treating fiber suspension
US5227064A (en) * 1989-03-13 1993-07-13 Kent Strid Filter for continuous filtration
WO1994001617A1 (en) * 1992-07-07 1994-01-20 Larox Oy Method for filtering a product formed in causticization
US5401422A (en) * 1990-10-18 1995-03-28 Eastman Kodak Company Separation method for solid constituents of a suspension and device for carrying out this method
AU666227B2 (en) * 1992-11-06 1996-02-01 Andritz-Patentverwaltungs-Gmbh Process and installation for the separation of solid-liquid-mixtures
WO1999049951A1 (en) * 1998-03-30 1999-10-07 Outokumpu Oyj Apparatus for removing material from a pressurised filter
US5968372A (en) * 1996-12-16 1999-10-19 Baker Hughes Incorporated Logic controlled traversing shower
EP0967000A1 (en) * 1998-06-25 1999-12-29 Outokumpu Oyj Method for producing a filter cake
US6063294A (en) * 1996-10-15 2000-05-16 Baker Hughes Incorporated Uniform area shower for disc filter
US6258282B1 (en) * 1997-08-21 2001-07-10 Kvaerner Pulping Ab Rotatable filter system for filtration of a flowing substance
US6409929B2 (en) * 1992-11-11 2002-06-25 Bokela Ingenieurgesellschaft Fur Mechanische Verfahrenstechnik Mbh Steam drying of rotary filter cakes without crack formation
US20030127401A1 (en) * 1999-01-19 2003-07-10 Benesi Steve C. Filter apparatus operating features
US20050121381A1 (en) * 2003-12-05 2005-06-09 Keith Sheets Filter disc with panel sectors
WO2005100681A1 (en) * 2004-04-16 2005-10-27 Kvaerner Pulping Ab Method and device for washing of lime mud
US20070235394A1 (en) * 2005-10-28 2007-10-11 Dendel Joseph W Mass thickening apparatus
US20080164222A1 (en) * 2004-11-25 2008-07-10 Andritz Oy Method and Apparatus for Thickening Lime Mud in a Disc Filter
US20100032388A1 (en) * 2007-02-21 2010-02-11 Hydrotech Veolia Water Systems Aktiebolag Device and Method for Cleaning a Filter Cloth
CN101829449A (zh) * 2010-05-18 2010-09-15 王光华 一种旋转压力过滤机
EP2468380A1 (de) * 2010-12-27 2012-06-27 Andritz KMPT GmbH Filtervorrichtung
US20120273432A1 (en) * 2011-02-05 2012-11-01 Urs Peuker Filter Device, Method for Its Operation and Use Thereof
US20120285867A1 (en) * 2011-05-11 2012-11-15 Elisabeth Schmidt Filter device, method for its operation and use thereof
US20140353260A1 (en) * 2011-12-15 2014-12-04 Andritz Oy Method and apparatus for washing pulp by means of intensified suction
US20140374363A1 (en) * 2012-02-06 2014-12-25 Andritz Oy Method and apparatus for reducing the thickness of a precoat layer of a disc filter
US9004289B2 (en) 2010-12-27 2015-04-14 Andritz Kmpt Gmbh Filter device
WO2018186795A1 (en) * 2017-04-07 2018-10-11 Valmet Ab Pressurized disc filter for causticization liquors containing lime mud
US10391728B2 (en) 2014-04-08 2019-08-27 Prime Solution Inc. Rotary fan press with auger
US10807024B2 (en) 2018-06-05 2020-10-20 Andritz Kmpt Gmbh Filter drum for a vacuum and/or pressure filtration device
US10870073B2 (en) 2018-06-05 2020-12-22 Andritz Kmpt Gmbh Vacuum and/or pressure filtration device for filtration of a suspension
US11000791B2 (en) * 2019-03-06 2021-05-11 Veolia Water Solutions & Technologies Support Rotary disc filter having backwash guides
US20210252436A1 (en) * 2018-06-21 2021-08-19 Valmet Ab Vacuum filter
US20210387114A1 (en) * 2018-11-05 2021-12-16 Ishigaki Company Limited Filter cloth cleaning method of filter press

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE463601B (sv) * 1989-03-13 1990-12-17 Hedemora Ab Filter foer kontinuerlig filtrering av en suspension
US5053123A (en) * 1989-04-17 1991-10-01 Ingersoll-Rand Company Adjustable valve for varying filtrate composition from filters
SE464390B (sv) * 1989-06-14 1991-04-22 Celleco Hedemora Ab Filter foer kontinuerlig filtrering
DE4123143C1 (sv) * 1991-07-12 1992-11-12 Werner Prof. Dr.-Ing. 6740 Landau De Stahl
DE4225818C2 (de) * 1991-09-11 1993-12-09 Geldmacher Joachim Filter zum kontinuierlichen Filtern von Feststoffe o. dgl. aufweisenden Flüssigkeiten
US5443534A (en) * 1992-07-21 1995-08-22 Vlt Corporation Providing electronic components for circuity assembly
DE4238087C3 (de) * 1992-11-11 1997-12-04 Bokela Ing Gmbh Verfahren zur mechanischen Entfeuchtung eines Filterkuchens und Vorrichtung zur Durchführung des Verfahrens
SE509553C2 (sv) * 1996-11-08 1999-02-08 Alfa Laval Ab Förfarande och anordning för separering av fina partiklar ur bakvatten
FI111812B (sv) * 2000-12-08 2003-09-30 Outokumpu Oy Filtrerförfarande
AT505247B1 (de) * 2007-05-30 2009-01-15 Andritz Ag Maschf Vakuumunterstütztes entwässerungsverfahren und rotierender filter zur durchführung des entwässerungsverfahrens
AT514597B1 (de) 2013-10-11 2015-02-15 Andritz Ag Maschf Filter zum kontinuierlichen Filtern einer Suspension unter Druck

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR701374A (fr) * 1925-10-28 1931-03-14 Procédé de filtrage et appareil pour sa réalisation
US4328099A (en) * 1980-02-08 1982-05-04 Krauss-Maffei Aktiengesellschaft Multi-disk rotary filter

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1401772A (en) * 1971-11-18 1975-07-30 Simonacco Ltd Filters
FI54060C (fi) * 1976-09-14 1978-10-10 Rauma Repola Oy Skivfilter
DE2852175A1 (de) * 1978-12-02 1980-06-12 Krauss Maffei Ag Steuerkopf an einem zellendrehfilter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR701374A (fr) * 1925-10-28 1931-03-14 Procédé de filtrage et appareil pour sa réalisation
US4328099A (en) * 1980-02-08 1982-05-04 Krauss-Maffei Aktiengesellschaft Multi-disk rotary filter

Cited By (52)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4929355A (en) * 1985-02-05 1990-05-29 Ab Hedemora Verkstader Method and apparatus for the separation of caustic liquor, lime sludge and sludge in a causticizing process
EP0315388A3 (en) * 1987-11-05 1989-05-31 A. Ahlstrom Corporation Method and apparatus for treating fiber suspension
US5073264A (en) * 1987-11-05 1991-12-17 A. Ahlstrom Corporation Apparatus for treating fiber suspension
US5192454A (en) * 1987-11-05 1993-03-09 A. Ahlstrom Corporation Method for treating fiber suspension
EP0315388A2 (en) * 1987-11-05 1989-05-10 A. Ahlstrom Corporation Method and apparatus for treating fiber suspension
US5227064A (en) * 1989-03-13 1993-07-13 Kent Strid Filter for continuous filtration
US5401422A (en) * 1990-10-18 1995-03-28 Eastman Kodak Company Separation method for solid constituents of a suspension and device for carrying out this method
WO1994001617A1 (en) * 1992-07-07 1994-01-20 Larox Oy Method for filtering a product formed in causticization
AU666227B2 (en) * 1992-11-06 1996-02-01 Andritz-Patentverwaltungs-Gmbh Process and installation for the separation of solid-liquid-mixtures
US6409929B2 (en) * 1992-11-11 2002-06-25 Bokela Ingenieurgesellschaft Fur Mechanische Verfahrenstechnik Mbh Steam drying of rotary filter cakes without crack formation
US6063294A (en) * 1996-10-15 2000-05-16 Baker Hughes Incorporated Uniform area shower for disc filter
US5968372A (en) * 1996-12-16 1999-10-19 Baker Hughes Incorporated Logic controlled traversing shower
US6258282B1 (en) * 1997-08-21 2001-07-10 Kvaerner Pulping Ab Rotatable filter system for filtration of a flowing substance
WO1999049951A1 (en) * 1998-03-30 1999-10-07 Outokumpu Oyj Apparatus for removing material from a pressurised filter
AU755208B2 (en) * 1998-03-30 2002-12-05 Outokumpu Oyj Apparatus for removing material from a pressurised filter
EP0967000A1 (en) * 1998-06-25 1999-12-29 Outokumpu Oyj Method for producing a filter cake
US6419835B1 (en) * 1998-06-25 2002-07-16 Outokumpu Oyj Method for producing a filter cake
AU753687B2 (en) * 1998-06-25 2002-10-24 Outokumpu Oyj Method for producing a filter cake
US20030127401A1 (en) * 1999-01-19 2003-07-10 Benesi Steve C. Filter apparatus operating features
US20050121381A1 (en) * 2003-12-05 2005-06-09 Keith Sheets Filter disc with panel sectors
US7314556B2 (en) 2003-12-05 2008-01-01 Andritz Inc. Filter disc with panel sectors
WO2005100681A1 (en) * 2004-04-16 2005-10-27 Kvaerner Pulping Ab Method and device for washing of lime mud
US20070221345A1 (en) * 2004-04-16 2007-09-27 Patrik Lownertz Method and Device for Washing of Lime Mud
US7686964B2 (en) * 2004-04-16 2010-03-30 Metso Fiber Karlstad Ab Method and device for washing of lime mud
US20080164222A1 (en) * 2004-11-25 2008-07-10 Andritz Oy Method and Apparatus for Thickening Lime Mud in a Disc Filter
US8002994B2 (en) * 2004-11-25 2011-08-23 Andritz Oy Method and apparatus for thickening lime mud in a disc filter
US20070235394A1 (en) * 2005-10-28 2007-10-11 Dendel Joseph W Mass thickening apparatus
US20100032388A1 (en) * 2007-02-21 2010-02-11 Hydrotech Veolia Water Systems Aktiebolag Device and Method for Cleaning a Filter Cloth
US8101090B2 (en) * 2007-02-21 2012-01-24 Veolia Water Solutions & Technologies Support Device and method for cleaning a filter cloth
US8444862B2 (en) 2007-02-21 2013-05-21 Veolia Water Solutions & Technologies Support Device and method for cleaning a filter cloth
CN101829449A (zh) * 2010-05-18 2010-09-15 王光华 一种旋转压力过滤机
US9004289B2 (en) 2010-12-27 2015-04-14 Andritz Kmpt Gmbh Filter device
EP2468380A1 (de) * 2010-12-27 2012-06-27 Andritz KMPT GmbH Filtervorrichtung
US20120160748A1 (en) * 2010-12-27 2012-06-28 Gunnar Grim Filter Device
DE102010061561A1 (de) * 2010-12-27 2012-06-28 Andritz Kmpt Gmbh Filtervorrichtung
US9216369B2 (en) * 2010-12-27 2015-12-22 Andritz Kmpt Gmbh Filter device
US20120273432A1 (en) * 2011-02-05 2012-11-01 Urs Peuker Filter Device, Method for Its Operation and Use Thereof
US9486721B2 (en) * 2011-05-02 2016-11-08 Siemens Aktiengesellschaft Filter device, method for its operation and use thereof
US20120285867A1 (en) * 2011-05-11 2012-11-15 Elisabeth Schmidt Filter device, method for its operation and use thereof
US8967390B2 (en) * 2011-05-11 2015-03-03 Siemens Aktiengesellschaft Filter device, method for its operation and use thereof
US20140353260A1 (en) * 2011-12-15 2014-12-04 Andritz Oy Method and apparatus for washing pulp by means of intensified suction
US9901853B2 (en) * 2011-12-15 2018-02-27 Andritz Oy Method and apparatus for washing pulp by means of intensified suction
US20140374363A1 (en) * 2012-02-06 2014-12-25 Andritz Oy Method and apparatus for reducing the thickness of a precoat layer of a disc filter
US9259674B2 (en) * 2012-02-06 2016-02-16 Andritz Oy Method and apparatus for reducing the thickness of a precoat layer of a disc filter
US10391728B2 (en) 2014-04-08 2019-08-27 Prime Solution Inc. Rotary fan press with auger
WO2018186795A1 (en) * 2017-04-07 2018-10-11 Valmet Ab Pressurized disc filter for causticization liquors containing lime mud
US10807024B2 (en) 2018-06-05 2020-10-20 Andritz Kmpt Gmbh Filter drum for a vacuum and/or pressure filtration device
US10870073B2 (en) 2018-06-05 2020-12-22 Andritz Kmpt Gmbh Vacuum and/or pressure filtration device for filtration of a suspension
US20210252436A1 (en) * 2018-06-21 2021-08-19 Valmet Ab Vacuum filter
US11980837B2 (en) * 2018-06-21 2024-05-14 Valmet Ab Rotary drum vacuum filter with a throttling valve
US20210387114A1 (en) * 2018-11-05 2021-12-16 Ishigaki Company Limited Filter cloth cleaning method of filter press
US11000791B2 (en) * 2019-03-06 2021-05-11 Veolia Water Solutions & Technologies Support Rotary disc filter having backwash guides

Also Published As

Publication number Publication date
JPH0675656B2 (ja) 1994-09-28
FI83596B (fi) 1991-04-30
CA1268427A (en) 1990-05-01
FI861791A (fi) 1986-11-03
SE451948B (sv) 1987-11-09
SE8502122D0 (sv) 1985-05-02
DE3614668A1 (de) 1986-12-18
SE8502122L (sv) 1986-11-03
FI861791A0 (fi) 1986-04-29
JPS6230518A (ja) 1987-02-09
FI83596C (sv) 1991-08-12

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